package v1

import (
	"bytes"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/gin-gonic/gin"
	"github.com/stretchr/testify/assert"
)

func setupLinearIntegrationRouter() *gin.Engine {
	gin.SetMode(gin.TestMode)
	r := gin.New()
	r.RedirectTrailingSlash = false

	handler := NewLinearIntegrationHandler(nil)

	integrations := r.Group("/api/v1/accounts/:account_id/integrations")
	RegisterLinearIntegrationRoutes(integrations, handler)

	return r
}

// ========================================
// LinearIntegration — param validation tests
// ========================================

func TestLinearIntegration_Delete_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("DELETE", "/api/v1/accounts/abc/integrations/linear/", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestLinearIntegration_GetTeams_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/integrations/linear/teams", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestLinearIntegration_GetTeamEntities_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/integrations/linear/team_entities", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestLinearIntegration_CreateIssue_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/abc/integrations/linear/create_issue", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestLinearIntegration_CreateIssue_InvalidJSON(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/1/integrations/linear/create_issue", bytes.NewReader([]byte("invalid json")))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	// account_id passes, ShouldBindJSON fails
	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.False(t, resp["success"].(bool))
}

func TestLinearIntegration_LinkIssue_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/abc/integrations/linear/link_issue", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestLinearIntegration_LinkIssue_InvalidJSON(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/1/integrations/linear/link_issue", bytes.NewReader([]byte("invalid json")))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	// account_id passes, ShouldBindJSON fails
	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.False(t, resp["success"].(bool))
}

func TestLinearIntegration_UnlinkIssue_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/abc/integrations/linear/unlink_issue", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestLinearIntegration_UnlinkIssue_InvalidJSON(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("POST", "/api/v1/accounts/1/integrations/linear/unlink_issue", bytes.NewReader([]byte("invalid json")))
	req.Header.Set("Content-Type", "application/json")
	r.ServeHTTP(w, req)

	// account_id passes, ShouldBindJSON fails
	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.False(t, resp["success"].(bool))
}

func TestLinearIntegration_SearchIssue_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/integrations/linear/search_issue", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}

func TestLinearIntegration_SearchIssue_BlankQuery(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/1/integrations/linear/search_issue", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusUnprocessableEntity, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	assert.Equal(t, "Specify search string with parameter q", resp["error"])
}

func TestLinearIntegration_GetLinkedIssues_BadAccountID(t *testing.T) {
	r := setupLinearIntegrationRouter()

	w := httptest.NewRecorder()
	req, _ := http.NewRequest("GET", "/api/v1/accounts/abc/integrations/linear/linked_issues", nil)
	r.ServeHTTP(w, req)

	assert.Equal(t, http.StatusBadRequest, w.Code)

	var resp map[string]interface{}
	json.Unmarshal(w.Body.Bytes(), &resp)
	errBody := resp["error"].(map[string]interface{})
	assert.Contains(t, errBody["message"], "invalid account_id")
}